ASTROSAT CZTI

Data Quality Report

Orbit 20210423_A10_097T01_9000004334_level2

Creation date: 2022-09-14T10:33:44.598730
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A10_097T01_9000004334cztM0_level2_bc.evt modeM0/AS1A10_097T01_9000004334cztM0_level2_quad_clean.evt
Size (bytes)5,638,616,6401,507,006,080
Size5.3 GB 1.4 GB
Events in quadrant A22,404,75310,013,700
Events in quadrant B48,537,8119,981,047
Events in quadrant C63,432,0309,243,610
Events in quadrant D29,714,3669,661,131

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020020
B020020
C020020
D020020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02094910
B02987590
C03468900
D02263490

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9841016821.709176%
B9841022222.257901%
C984101535415.602073%
D9841012701.290519%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 112820 98413 62 62 0.05% 0.06%
B 112820 98413 12 12 0.01% 0.01%
C 112819 98409 2200 2200 1.95% 2.24%
D 112820 98413 47 47 0.04% 0.05%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 13 1901265 1688.96 5251 5173 1122.6
A 8 192 186758 161.75 5251 5173 1122.6
A 13 254 168707 145.67 5251 5173 1122.6
B 6 159 27515422 27526.46 5251 5133 999.4
B 0 190 421889 417.0 5251 5133 999.4
B 4 171 252681 247.69 5251 5133 999.4
C 3 233 44098456 37781.05 4893 4883 1167.1
C 2 114 181625 151.44 4893 4883 1167.1
C 15 208 120555 99.11 4893 4883 1167.1
D 1 52 3709507 2977.24 5188 5051 1244.3
D 8 195 2746143 2202.99 5188 5051 1244.3
D 12 227 1268764 1015.64 5188 5051 1244.3

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter